1210122139 has 2 divisors, whose sum is σ = 1210122140. Its totient is φ = 1210122138.

The previous prime is 1210122131. The next prime is 1210122149. The reversal of 1210122139 is 9312210121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210122139 - 2³ = 1210122131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1210122131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605061069 + 605061070.

It is an arithmetic number, because the mean of its divisors is an integer number (605061070).

Almost surely, 2^1210122139 is an apocalyptic number.

1210122139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210122139 is an equidigital number, since it uses as much as digits as its factorization.

1210122139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1210122139 is about 34786.8098422376. The cubic root of 1210122139 is about 1065.6380899932.

The spelling of 1210122139 in words is "one billion, two hundred ten million, one hundred twenty-two thousand, one hundred thirty-nine".